./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b041289a049a7233b2a378ca6fc5bbde9d5c291c849eb6ce585cee09751124ba --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:25:45,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:25:45,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:25:45,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:25:45,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:25:45,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:25:45,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:25:45,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:25:45,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:25:45,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:25:45,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:25:45,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:25:45,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:25:45,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:25:45,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:25:45,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:25:45,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:25:45,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:25:45,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:25:45,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:25:45,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:25:45,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:25:45,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:25:45,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:25:45,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:25:45,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:25:45,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:25:45,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:25:45,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:25:45,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:25:45,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:25:45,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:25:45,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:25:45,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:25:45,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:25:45,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:25:45,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:25:45,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:25:45,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:25:45,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:25:45,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:25:45,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:25:45,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:25:45,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:25:45,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:25:45,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:25:45,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:25:45,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:25:45,329 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:25:45,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:25:45,329 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:25:45,329 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:25:45,331 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:25:45,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:25:45,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:25:45,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:25:45,331 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:25:45,332 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:25:45,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:25:45,332 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:25:45,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:25:45,333 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:25:45,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:25:45,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:25:45,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:25:45,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:25:45,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:25:45,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:25:45,335 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:25:45,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:25:45,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:25:45,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:25:45,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:25:45,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:25:45,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:45,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:25:45,337 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:25:45,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:25:45,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:25:45,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:25:45,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:25:45,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:25:45,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:25:45,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b041289a049a7233b2a378ca6fc5bbde9d5c291c849eb6ce585cee09751124ba [2022-11-19 07:25:45,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:25:45,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:25:45,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:25:45,680 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:25:45,680 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:25:45,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_3+newton_2_5.i [2022-11-19 07:25:45,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data/70f41ec08/4576d460ecd146dbb87f9f28cbcf71cc/FLAG752240f26 [2022-11-19 07:25:46,351 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:25:46,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i [2022-11-19 07:25:46,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data/70f41ec08/4576d460ecd146dbb87f9f28cbcf71cc/FLAG752240f26 [2022-11-19 07:25:46,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data/70f41ec08/4576d460ecd146dbb87f9f28cbcf71cc [2022-11-19 07:25:46,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:25:46,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:25:46,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:46,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:25:46,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:25:46,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eff13ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46, skipping insertion in model container [2022-11-19 07:25:46,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:25:46,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:25:47,040 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i[1226,1239] [2022-11-19 07:25:47,087 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i[2841,2854] [2022-11-19 07:25:47,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:47,100 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:25:47,116 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i[1226,1239] [2022-11-19 07:25:47,129 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i[2841,2854] [2022-11-19 07:25:47,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:47,147 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:25:47,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47 WrapperNode [2022-11-19 07:25:47,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:47,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:47,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:25:47,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:25:47,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,196 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-11-19 07:25:47,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:47,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:25:47,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:25:47,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:25:47,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:25:47,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:25:47,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:25:47,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:25:47,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (1/1) ... [2022-11-19 07:25:47,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:47,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:47,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:25:47,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:25:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:25:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 07:25:47,327 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 07:25:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 07:25:47,328 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 07:25:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:25:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:25:47,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:25:47,418 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:25:47,420 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:25:47,709 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:25:47,855 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:25:47,856 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:25:47,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:25:47 BoogieIcfgContainer [2022-11-19 07:25:47,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:25:47,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:25:47,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:25:47,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:25:47,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:25:46" (1/3) ... [2022-11-19 07:25:47,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34917c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:25:47, skipping insertion in model container [2022-11-19 07:25:47,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:47" (2/3) ... [2022-11-19 07:25:47,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34917c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:25:47, skipping insertion in model container [2022-11-19 07:25:47,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:25:47" (3/3) ... [2022-11-19 07:25:47,888 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_5.i [2022-11-19 07:25:47,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:25:47,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:25:47,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:25:48,001 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41b065, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:25:48,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:25:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:25:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:25:48,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:48,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:25:48,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash -499021812, now seen corresponding path program 1 times [2022-11-19 07:25:48,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:48,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869294618] [2022-11-19 07:25:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:48,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:48,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:48,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869294618] [2022-11-19 07:25:48,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869294618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:48,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:48,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:25:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300928655] [2022-11-19 07:25:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:48,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:25:48,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:25:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:25:48,890 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:49,071 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-19 07:25:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:25:49,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:25:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:49,082 INFO L225 Difference]: With dead ends: 45 [2022-11-19 07:25:49,082 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:25:49,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:25:49,093 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:49,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 64 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:25:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:25:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 07:25:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:25:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-19 07:25:49,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2022-11-19 07:25:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:49,149 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-19 07:25:49,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-19 07:25:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:25:49,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:49,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:49,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:25:49,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:49,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1643785969, now seen corresponding path program 1 times [2022-11-19 07:25:49,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:49,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791006091] [2022-11-19 07:25:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:49,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:49,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:25:49,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541661683] [2022-11-19 07:25:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:49,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:49,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:49,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:49,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:25:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:25:49,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:59,061 WARN L233 SmtUtils]: Spent 8.69s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:26:01,476 WARN L859 $PredicateComparison]: unable to prove that (or (and (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (< |c_ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse1 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse0 (<= .cse1 127))) (or (and (not .cse0) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= 0 (mod (+ .cse1 (- 256)) |ULTIMATE.start_gcd_test_#res#1|)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) (and .cse0 (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= (mod (mod .cse1 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))))))))) is different from true [2022-11-19 07:26:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:01,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:09,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:09,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791006091] [2022-11-19 07:26:09,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:26:09,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541661683] [2022-11-19 07:26:09,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541661683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:09,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473737952] [2022-11-19 07:26:09,977 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:26:09,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:26:09,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:26:09,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:26:09,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:26:12,260 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:26:14,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '175#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~b#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (< 0 |ULTIMATE.start_main1_~x~0#1|) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (ite (<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main1_~y~0#1| 128)) (= |#NULL.base| 0))' at error location [2022-11-19 07:26:14,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:26:14,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:26:14,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-19 07:26:14,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388211064] [2022-11-19 07:26:14,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:14,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:26:14,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:26:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=145, Unknown=3, NotChecked=24, Total=210 [2022-11-19 07:26:14,440 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:15,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:27:27,780 WARN L233 SmtUtils]: Spent 1.11m on a formula simplification. DAG size of input: 88 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:29,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:27:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:30,226 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-19 07:27:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:27:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:27:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:30,228 INFO L225 Difference]: With dead ends: 26 [2022-11-19 07:27:30,228 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 07:27:30,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 91.4s TimeCoverageRelationStatistics Valid=43, Invalid=168, Unknown=3, NotChecked=26, Total=240 [2022-11-19 07:27:30,233 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:30,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 33 Unchecked, 4.3s Time] [2022-11-19 07:27:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 07:27:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-19 07:27:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:27:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-19 07:27:30,243 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2022-11-19 07:27:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:30,244 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-19 07:27:30,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-19 07:27:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:27:30,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:30,245 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:30,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:30,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:30,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash -648649556, now seen corresponding path program 2 times [2022-11-19 07:27:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:30,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355697170] [2022-11-19 07:27:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:30,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:30,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:27:30,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784508020] [2022-11-19 07:27:30,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:30,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:30,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:30,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:30,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:27:30,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:27:30,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:27:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:36,854 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (< |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256))) (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (<= .cse0 127) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| .cse0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (= .cse1 .cse2) (not (<= .cse1 127)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)))))) (not .cse3)) (and .cse3 (let ((.cse10 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse11 (<= .cse10 127))) (or (and (let ((.cse5 (+ .cse10 (- 256)))) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse4 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse4 256)) (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= .cse4 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse6 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= (mod (+ .cse6 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256) .cse2) (not (<= (mod .cse6 256) 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse7 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256)) (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse7 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse8 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= (mod (+ .cse8 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256) .cse2) (not (= .cse8 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse9 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= .cse9 0)) (= (mod (+ .cse9 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256) .cse2)))))) (not .cse11)) (and .cse11 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse10 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))))))))) is different from true [2022-11-19 07:27:39,821 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256))) (or (and (not .cse0) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (not (<= .cse1 127)) (= .cse2 .cse1) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse3 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (<= .cse3 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse3) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))))) (and .cse0 (let ((.cse11 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse4 (<= .cse11 127))) (or (and (not .cse4) (let ((.cse6 (+ .cse11 (- 256)))) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse5 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse2 (mod (+ .cse5 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= .cse5 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse7 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse7 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse7 256))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse8 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= .cse2 (mod (+ .cse8 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)) (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (not (= .cse8 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse9 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= .cse9 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse9 256))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse10 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse2 (mod (+ .cse10 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (<= (mod .cse10 256) 127)))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse11 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)))) .cse4))))))) is different from true [2022-11-19 07:27:43,016 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (< |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse1 (+ 256 |c_ULTIMATE.start_main1_~g~0#1|))) (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (<= .cse0 127) (<= |c_ULTIMATE.start_main1_~g~0#1| .cse0) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (<= .cse1 .cse2) (not (<= .cse2 127)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)))))) (not .cse3)) (and .cse3 (let ((.cse10 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse11 (<= .cse10 127))) (or (and (let ((.cse5 (+ .cse10 (- 256)))) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse4 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (<= .cse1 (mod (+ .cse4 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)) (not (= .cse4 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse6 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (<= |c_ULTIMATE.start_main1_~g~0#1| (mod .cse6 256)) (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse6 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse7 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (<= .cse1 (mod (+ .cse7 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (<= (mod .cse7 256) 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse8 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (<= .cse1 (mod (+ .cse8 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= .cse8 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse9 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (<= |c_ULTIMATE.start_main1_~g~0#1| (mod .cse9 256)) (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= .cse9 0)))))) (not .cse11)) (and .cse11 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| (mod (mod .cse10 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))))))))) is different from true [2022-11-19 07:27:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-19 07:27:43,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:52,925 WARN L859 $PredicateComparison]: unable to prove that (or (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)) (let ((.cse0 (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (let ((.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse11 (not .cse0)) (.cse3 (+ |c_ULTIMATE.start_main1_~x~0#1| 1))) (and (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse1 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse2 (mod .cse1 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse1) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 127) (not (<= .cse2 127)) (< .cse2 .cse3)))))) (or .cse4 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse6 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse6) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse5) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse6) 256)) (< .cse5 .cse3) (<= (mod .cse6 256) 127)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse7 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse8 (mod .cse7 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse7) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse7) 256) 127)) (not (<= .cse8 127)) (< .cse8 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse10 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse9 (mod .cse10 256))) (or (< 127 .cse9) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse10) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse10) 256)) (< .cse9 .cse3)))))) (or .cse11 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse13 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256))) (or (< 127 (mod .cse12 256)) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse13) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256)) (< .cse13 .cse3)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse14 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse15 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse14) 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 127) (= .cse14 0) (not (<= .cse15 127)) (< .cse15 .cse3) (not (<= (mod .cse14 256) 127)))))) .cse11) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse16 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse17 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse16) 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (<= .cse17 127)) (< .cse17 .cse3) (<= (mod .cse16 256) 127))))) .cse11) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse18 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse19 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse18) 256) 127) (not (<= .cse19 127)) (< .cse19 .cse3) (<= (mod .cse18 256) 127))))) .cse11) (or .cse4 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse20 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse20) 256))) (or (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse20) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse21) (< .cse21 .cse3) (<= (mod .cse20 256) 127)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse22 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse23 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse22) 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse22) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (<= .cse23 127)) (< .cse23 .cse3) (not (<= (mod .cse22 256) 127)))))) .cse11) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse25 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod .cse25 256))) (or (< 127 .cse24) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse25) 256)) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse25) 256)) (< .cse24 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (mod .cse27 256))) (or (< 127 .cse26) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse27) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< .cse26 .cse3)))))) (or .cse11 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse28 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse29 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse28) 256))) (or (< 127 (mod .cse28 256)) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse28) 256) 127) (= .cse28 0) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse29) (< .cse29 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse31 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse30 (mod .cse31 256))) (or (< 127 .cse30) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse31) 256)) (< .cse30 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse33 (mod .cse32 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256) 127) (not (<= .cse33 127)) (< .cse33 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse34 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse35 (mod .cse34 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse34) 256) 127) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse34) 256) 127)) (not (<= .cse35 127)) (< .cse35 .cse3)))))))))) is different from true [2022-11-19 07:27:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-19 07:27:53,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355697170] [2022-11-19 07:27:53,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:27:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784508020] [2022-11-19 07:27:53,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784508020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:53,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362622167] [2022-11-19 07:27:53,286 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:27:53,286 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:53,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:53,287 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:53,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:53,419 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:54,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~b#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (< 0 |ULTIMATE.start_main1_~x~0#1|) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (ite (<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main1_~y~0#1| 128)) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:54,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:54,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:27:54,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-19 07:27:54,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588716917] [2022-11-19 07:27:54,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:54,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:27:54,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:27:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=126, Unknown=4, NotChecked=100, Total=272 [2022-11-19 07:27:54,127 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:56,272 WARN L837 $PredicateComparison]: unable to prove that (and (or (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)) (let ((.cse0 (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (let ((.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse11 (not .cse0)) (.cse3 (+ |c_ULTIMATE.start_main1_~x~0#1| 1))) (and (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse1 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse2 (mod .cse1 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse1) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 127) (not (<= .cse2 127)) (< .cse2 .cse3)))))) (or .cse4 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse6 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse6) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse5) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse6) 256)) (< .cse5 .cse3) (<= (mod .cse6 256) 127)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse7 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse8 (mod .cse7 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse7) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse7) 256) 127)) (not (<= .cse8 127)) (< .cse8 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse10 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse9 (mod .cse10 256))) (or (< 127 .cse9) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse10) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse10) 256)) (< .cse9 .cse3)))))) (or .cse11 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse13 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256))) (or (< 127 (mod .cse12 256)) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse13) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256)) (< .cse13 .cse3)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse14 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse15 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse14) 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 127) (= .cse14 0) (not (<= .cse15 127)) (< .cse15 .cse3) (not (<= (mod .cse14 256) 127)))))) .cse11) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse16 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse17 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse16) 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (<= .cse17 127)) (< .cse17 .cse3) (<= (mod .cse16 256) 127))))) .cse11) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse18 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse19 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse18) 256) 127) (not (<= .cse19 127)) (< .cse19 .cse3) (<= (mod .cse18 256) 127))))) .cse11) (or .cse4 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse20 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse20) 256))) (or (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse20) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse21) (< .cse21 .cse3) (<= (mod .cse20 256) 127)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse22 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse23 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse22) 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse22) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (<= .cse23 127)) (< .cse23 .cse3) (not (<= (mod .cse22 256) 127)))))) .cse11) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse25 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod .cse25 256))) (or (< 127 .cse24) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse25) 256)) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse25) 256)) (< .cse24 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (mod .cse27 256))) (or (< 127 .cse26) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse27) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< .cse26 .cse3)))))) (or .cse11 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse28 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse29 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse28) 256))) (or (< 127 (mod .cse28 256)) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse28) 256) 127) (= .cse28 0) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse29) (< .cse29 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse31 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse30 (mod .cse31 256))) (or (< 127 .cse30) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse31) 256)) (< .cse30 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse33 (mod .cse32 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256) 127) (not (<= .cse33 127)) (< .cse33 .cse3)))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse34 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse35 (mod .cse34 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse34) 256) 127) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse34) 256) 127)) (not (<= .cse35 127)) (< .cse35 .cse3)))))))))) (let ((.cse36 (< |c_ULTIMATE.start_main1_~x~0#1| 0))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|) (not .cse36)) (and .cse36 (let ((.cse38 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse37 (<= .cse38 127))) (or (and (not .cse37) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse38)) (and (= .cse38 |c_ULTIMATE.start_gcd_test_~a#1|) .cse37)))))))) is different from false [2022-11-19 07:27:58,820 WARN L859 $PredicateComparison]: unable to prove that (and (let ((.cse3 (< |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256))) (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (<= .cse0 127) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| .cse0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (= .cse1 .cse2) (not (<= .cse1 127)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)))))) (not .cse3)) (and .cse3 (let ((.cse10 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse11 (<= .cse10 127))) (or (and (let ((.cse5 (+ .cse10 (- 256)))) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse4 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse4 256)) (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= .cse4 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse6 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= (mod (+ .cse6 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256) .cse2) (not (<= (mod .cse6 256) 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse7 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256)) (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse7 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse8 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= (mod (+ .cse8 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256) .cse2) (not (= .cse8 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse9 (mod .cse5 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= .cse9 0)) (= (mod (+ .cse9 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256) .cse2)))))) (not .cse11)) (and .cse11 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse10 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))))))))) (or (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)) (not (<= |c_ULTIMATE.start_gcd_test_~b#1| 127)) (< |c_ULTIMATE.start_gcd_test_~b#1| (+ |c_ULTIMATE.start_main1_~x~0#1| 1)))) is different from true [2022-11-19 07:28:01,367 WARN L859 $PredicateComparison]: unable to prove that (and (or (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)) (< |c_ULTIMATE.start_gcd_test_~a#1| (+ |c_ULTIMATE.start_main1_~x~0#1| 1))) (let ((.cse0 (< |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256))) (or (and (not .cse0) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (not (<= .cse1 127)) (= .cse2 .cse1) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse3 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_24|) 256))) (and (<= .cse3 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse3) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0))))))) (and .cse0 (let ((.cse11 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse4 (<= .cse11 127))) (or (and (not .cse4) (let ((.cse6 (+ .cse11 (- 256)))) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse5 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse2 (mod (+ .cse5 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= .cse5 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse7 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse7 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse7 256))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse8 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (= .cse2 (mod (+ .cse8 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)) (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (not (= .cse8 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse9 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0) (= .cse9 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse9 256))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (let ((.cse10 (mod .cse6 |v_ULTIMATE.start_gcd_test_~b#1_24|))) (and (not (< |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= .cse2 (mod (+ .cse10 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_24|)) 256)) (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (not (<= (mod .cse10 256) 127)))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_24| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_24| 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse11 |v_ULTIMATE.start_gcd_test_~b#1_24|) 256)))) .cse4)))))))) is different from true [2022-11-19 07:28:59,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2022-11-19 07:28:59,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:28:59,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=48, Invalid=129, Unknown=7, NotChecked=196, Total=380 [2022-11-19 07:28:59,105 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:59,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-19 07:28:59,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:59,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:59,307 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 55 more [2022-11-19 07:28:59,312 INFO L158 Benchmark]: Toolchain (without parser) took 192621.13ms. Allocated memory was 138.4MB in the beginning and 176.2MB in the end (delta: 37.7MB). Free memory was 106.9MB in the beginning and 146.7MB in the end (delta: -39.7MB). Peak memory consumption was 95.7MB. Max. memory is 16.1GB. [2022-11-19 07:28:59,312 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 94.4MB. Free memory was 49.8MB in the beginning and 49.7MB in the end (delta: 69.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:28:59,313 INFO L158 Benchmark]: CACSL2BoogieTranslator took 452.77ms. Allocated memory is still 138.4MB. Free memory was 106.9MB in the beginning and 113.3MB in the end (delta: -6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:28:59,314 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.23ms. Allocated memory is still 138.4MB. Free memory was 113.3MB in the beginning and 111.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:28:59,314 INFO L158 Benchmark]: Boogie Preprocessor took 32.55ms. Allocated memory is still 138.4MB. Free memory was 111.2MB in the beginning and 110.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:28:59,315 INFO L158 Benchmark]: RCFGBuilder took 629.99ms. Allocated memory is still 138.4MB. Free memory was 110.2MB in the beginning and 94.5MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 07:28:59,316 INFO L158 Benchmark]: TraceAbstraction took 191435.56ms. Allocated memory was 138.4MB in the beginning and 176.2MB in the end (delta: 37.7MB). Free memory was 93.9MB in the beginning and 146.7MB in the end (delta: -52.7MB). Peak memory consumption was 86.2MB. Max. memory is 16.1GB. [2022-11-19 07:28:59,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 94.4MB. Free memory was 49.8MB in the beginning and 49.7MB in the end (delta: 69.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 452.77ms. Allocated memory is still 138.4MB. Free memory was 106.9MB in the beginning and 113.3MB in the end (delta: -6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.23ms. Allocated memory is still 138.4MB. Free memory was 113.3MB in the beginning and 111.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.55ms. Allocated memory is still 138.4MB. Free memory was 111.2MB in the beginning and 110.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 629.99ms. Allocated memory is still 138.4MB. Free memory was 110.2MB in the beginning and 94.5MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 191435.56ms. Allocated memory was 138.4MB in the beginning and 176.2MB in the end (delta: 37.7MB). Free memory was 93.9MB in the beginning and 146.7MB in the end (delta: -52.7MB). Peak memory consumption was 86.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b041289a049a7233b2a378ca6fc5bbde9d5c291c849eb6ce585cee09751124ba --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:29:01,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:29:01,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:29:01,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:29:01,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:29:01,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:29:01,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:29:01,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:29:01,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:29:01,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:29:01,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:29:01,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:29:01,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:29:01,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:29:01,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:29:01,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:29:01,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:29:01,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:29:01,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:29:01,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:29:01,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:29:01,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:29:01,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:29:01,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:29:01,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:29:01,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:29:01,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:29:01,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:29:01,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:29:01,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:29:01,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:29:01,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:29:01,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:29:01,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:29:01,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:29:01,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:29:01,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:29:01,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:29:01,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:29:01,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:29:01,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:29:01,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-19 07:29:02,002 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:29:02,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:29:02,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:29:02,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:29:02,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:29:02,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:29:02,004 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:29:02,004 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:29:02,005 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:29:02,005 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:29:02,005 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:29:02,005 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:29:02,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:29:02,007 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:29:02,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:29:02,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:29:02,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:29:02,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:29:02,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:29:02,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:29:02,008 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:29:02,008 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:29:02,009 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:29:02,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:29:02,009 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:29:02,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:29:02,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:29:02,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:29:02,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:29:02,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:02,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:29:02,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:29:02,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:29:02,011 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:29:02,012 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:02,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:29:02,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:29:02,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:29:02,013 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b041289a049a7233b2a378ca6fc5bbde9d5c291c849eb6ce585cee09751124ba [2022-11-19 07:29:02,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:29:02,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:29:02,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:29:02,523 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:29:02,524 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:29:02,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_3+newton_2_5.i [2022-11-19 07:29:02,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data/0bf943e9c/4d91df775b6748ad9b2789203fc2043f/FLAGfec8a2628 [2022-11-19 07:29:03,233 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:29:03,236 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i [2022-11-19 07:29:03,248 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data/0bf943e9c/4d91df775b6748ad9b2789203fc2043f/FLAGfec8a2628 [2022-11-19 07:29:03,548 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/data/0bf943e9c/4d91df775b6748ad9b2789203fc2043f [2022-11-19 07:29:03,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:29:03,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:29:03,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:03,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:29:03,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:29:03,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:03" (1/1) ... [2022-11-19 07:29:03,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db264d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:03, skipping insertion in model container [2022-11-19 07:29:03,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:03" (1/1) ... [2022-11-19 07:29:03,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:29:03,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:29:03,862 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i[1226,1239] [2022-11-19 07:29:03,903 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i[2841,2854] [2022-11-19 07:29:03,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:03,950 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:29:03,989 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i[1226,1239] [2022-11-19 07:29:04,002 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/sv-benchmarks/c/combinations/gcd_3+newton_2_5.i[2841,2854] [2022-11-19 07:29:04,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:04,022 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:29:04,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04 WrapperNode [2022-11-19 07:29:04,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:04,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:04,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:29:04,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:29:04,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,073 INFO L138 Inliner]: procedures = 28, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 80 [2022-11-19 07:29:04,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:04,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:29:04,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:29:04,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:29:04,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,107 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:29:04,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:29:04,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:29:04,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:29:04,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (1/1) ... [2022-11-19 07:29:04,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:04,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:04,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:29:04,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:29:04,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:29:04,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:29:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 07:29:04,210 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 07:29:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 07:29:04,210 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 07:29:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:29:04,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:29:04,313 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:29:04,316 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:29:13,663 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:29:13,671 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:29:13,672 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:29:13,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:13 BoogieIcfgContainer [2022-11-19 07:29:13,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:29:13,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:29:13,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:29:13,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:29:13,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:29:03" (1/3) ... [2022-11-19 07:29:13,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719e2eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:29:13, skipping insertion in model container [2022-11-19 07:29:13,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:04" (2/3) ... [2022-11-19 07:29:13,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719e2eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:29:13, skipping insertion in model container [2022-11-19 07:29:13,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:13" (3/3) ... [2022-11-19 07:29:13,686 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_5.i [2022-11-19 07:29:13,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:29:13,710 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:29:13,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:29:13,813 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f237697, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:29:13,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:29:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:29:13,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:13,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:13,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:13,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-11-19 07:29:13,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:13,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841712979] [2022-11-19 07:29:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:13,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:13,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:29:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:29:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:14,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:14,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841712979] [2022-11-19 07:29:14,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841712979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:14,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:14,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:14,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953609052] [2022-11-19 07:29:14,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:14,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:14,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:14,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:14,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:14,235 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:14,272 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-11-19 07:29:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:29:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:14,284 INFO L225 Difference]: With dead ends: 68 [2022-11-19 07:29:14,284 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 07:29:14,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:14,293 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:14,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-11-19 07:29:14,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 07:29:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 07:29:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-19 07:29:14,357 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2022-11-19 07:29:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:14,358 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-19 07:29:14,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-19 07:29:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:29:14,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:14,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:14,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:14,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:14,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-11-19 07:29:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:14,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418389360] [2022-11-19 07:29:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:14,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:14,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:14,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:14,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:29:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:14,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:29:14,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:14,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:14,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:14,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418389360] [2022-11-19 07:29:14,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418389360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:14,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:14,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:29:14,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326294532] [2022-11-19 07:29:14,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:14,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:29:14,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:14,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:29:14,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:14,896 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:15,082 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-19 07:29:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:29:15,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:29:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:15,086 INFO L225 Difference]: With dead ends: 46 [2022-11-19 07:29:15,088 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:29:15,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:15,090 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:15,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:29:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-19 07:29:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-19 07:29:15,109 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-19 07:29:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:15,110 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-19 07:29:15,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-19 07:29:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:29:15,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:15,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:15,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:15,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:15,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash -743724587, now seen corresponding path program 1 times [2022-11-19 07:29:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:15,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510630898] [2022-11-19 07:29:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:15,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:15,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:15,337 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:15,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:29:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:15,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:29:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:16,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:16,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510630898] [2022-11-19 07:29:16,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510630898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:16,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:16,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:29:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483046558] [2022-11-19 07:29:16,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:16,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:29:16,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:29:16,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:16,006 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:16,763 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-19 07:29:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:29:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:29:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:16,771 INFO L225 Difference]: With dead ends: 37 [2022-11-19 07:29:16,771 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:29:16,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:29:16,773 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:16,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 155 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:29:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-19 07:29:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-19 07:29:16,786 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-19 07:29:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:16,787 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-19 07:29:16,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-19 07:29:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:29:16,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:16,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:16,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:16,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:16,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-11-19 07:29:16,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:16,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87231641] [2022-11-19 07:29:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:16,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:17,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:17,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:29:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:17,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:29:17,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:20,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:38,674 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87231641] [2022-11-19 07:29:38,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87231641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545881178] [2022-11-19 07:29:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:38,676 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:38,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:38,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-19 07:29:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:38,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:29:38,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:58,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:14,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [545881178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:14,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100859582] [2022-11-19 07:30:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:14,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:14,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:14,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:14,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:30:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:14,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:30:14,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:35,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:35,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100859582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:35,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:30:35,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 28 [2022-11-19 07:30:35,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112147986] [2022-11-19 07:30:35,995 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:35,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:30:35,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:30:35,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:30:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=611, Unknown=12, NotChecked=0, Total=756 [2022-11-19 07:30:35,998 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:46,026 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-11-19 07:30:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:30:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:30:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:46,028 INFO L225 Difference]: With dead ends: 47 [2022-11-19 07:30:46,028 INFO L226 Difference]: Without dead ends: 34 [2022-11-19 07:30:46,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=146, Invalid=712, Unknown=12, NotChecked=0, Total=870 [2022-11-19 07:30:46,031 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:46,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 295 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 14 Unchecked, 0.6s Time] [2022-11-19 07:30:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-19 07:30:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-11-19 07:30:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:30:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-19 07:30:46,039 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 12 [2022-11-19 07:30:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:46,040 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-19 07:30:46,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-19 07:30:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:30:46,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:46,042 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:46,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:46,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-19 07:30:46,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:46,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:46,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2022-11-19 07:30:46,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:30:46,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094079922] [2022-11-19 07:30:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:30:46,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:30:46,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:30:46,649 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:30:46,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 07:30:52,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:30:52,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:30:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:30:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:18,614 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 18 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:31:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:22,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:33:15,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:33:15,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094079922] [2022-11-19 07:33:15,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094079922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:33:15,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [286753596] [2022-11-19 07:33:15,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:33:15,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:33:15,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:33:15,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:33:15,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 07:33:15,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:33:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:33:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:33:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:58,843 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 18 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:34:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:03,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:09,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [286753596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:09,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660698915] [2022-11-19 07:34:09,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:34:09,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:09,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:09,574 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:09,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:34:15,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:34:15,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:15,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:34:15,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:26,676 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 18 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:34:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:32,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:41,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660698915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:41,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:34:41,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 24 [2022-11-19 07:34:41,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49102561] [2022-11-19 07:34:41,367 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:41,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:34:41,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:34:41,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:34:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=434, Unknown=41, NotChecked=0, Total=552 [2022-11-19 07:34:41,369 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:43,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:46,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:57,752 WARN L233 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 35 DAG size of output: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:34:59,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:32,052 WARN L233 SmtUtils]: Spent 24.37s on a formula simplification. DAG size of input: 40 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:05,260 WARN L233 SmtUtils]: Spent 18.10s on a formula simplification. DAG size of input: 36 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:49,415 WARN L233 SmtUtils]: Spent 27.37s on a formula simplification. DAG size of input: 45 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:19,862 WARN L233 SmtUtils]: Spent 8.93s on a formula simplification. DAG size of input: 33 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:34,630 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 33 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:34,648 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-11-19 07:37:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:37:34,649 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:37:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:34,650 INFO L225 Difference]: With dead ends: 47 [2022-11-19 07:37:34,650 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:37:34,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 313.7s TimeCoverageRelationStatistics Valid=138, Invalid=798, Unknown=56, NotChecked=0, Total=992 [2022-11-19 07:37:34,652 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:34,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 339 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 3 Unknown, 32 Unchecked, 6.7s Time] [2022-11-19 07:37:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:37:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-11-19 07:37:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:37:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-11-19 07:37:34,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 14 [2022-11-19 07:37:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:34,663 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-11-19 07:37:34,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-11-19 07:37:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:37:34,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:34,665 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:34,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:34,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:35,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:35,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:35,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1911673028, now seen corresponding path program 1 times [2022-11-19 07:37:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:35,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880726351] [2022-11-19 07:37:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:35,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:35,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:35,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:37:35,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 07:37:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:40,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:37:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:38:15,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:25,417 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main1_~x~0#1_11| (_ BitVec 8))) (let ((.cse2 ((_ sign_extend 24) |v_ULTIMATE.start_main1_~x~0#1_11|)) (.cse3 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse3))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse0))))) (or (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32))) (not (bvsgt .cse2 (_ bv0 32))) (bvsge .cse2 .cse1)))))) is different from false [2022-11-19 07:40:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:40:27,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:40:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880726351] [2022-11-19 07:40:27,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880726351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1015732893] [2022-11-19 07:40:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:27,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:40:27,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:40:27,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:40:27,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36203ee4-a0a9-4ec3-bf7c-79a5f6fcb921/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-19 07:40:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:28,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:40:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates...